KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > com > caucho > quercus > lib > file > PopenInput


1 /*
2  * Copyright (c) 1998-2006 Caucho Technology -- all rights reserved
3  *
4  * This file is part of Resin(R) Open Source
5  *
6  * Each copy or derived work must preserve the copyright notice and this
7  * notice unmodified.
8  *
9  * Resin Open Source is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License as published by
11  * the Free Software Foundation; either version 2 of the License, or
12  * (at your option) any later version.
13  *
14  * Resin Open Source is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
17  * of NON-INFRINGEMENT. See the GNU General Public License for more
18  * details.
19  *
20  * You should have received a copy of the GNU General Public License
21  * along with Resin Open Source; if not, write to the
22  *
23  * Free Software Foundation, Inc.
24  * 59 Temple Place, Suite 330
25  * Boston, MA 02111-1307 USA
26  *
27  * @author Emil Ong
28  */

29
30 package com.caucho.quercus.lib.file;
31
32 import com.caucho.quercus.env.Env;
33 import com.caucho.vfs.ReadStream;
34 import com.caucho.vfs.VfsStream;
35
36 import java.io.IOException JavaDoc;
37 import java.util.logging.Logger JavaDoc;
38
39 /**
40  * Represents an input stream for a popen'ed process.
41  */

42 public class PopenInput extends ReadStreamInput {
43   private static final Logger JavaDoc log
44     = Logger.getLogger(FileInput.class.getName());
45
46   private Env _env;
47   private Process JavaDoc _process;
48
49   public PopenInput(Env env, Process JavaDoc process)
50     throws IOException JavaDoc
51   {
52     _env = env;
53     
54     _env.addClose(this);
55
56     _process = process;
57
58     init(new ReadStream(new VfsStream(_process.getInputStream(), null)));
59
60     _process.getOutputStream().close();
61   }
62
63   /**
64    * Opens a copy.
65    */

66   public BinaryInput openCopy()
67     throws IOException JavaDoc
68   {
69     return new PopenInput(_env, _process);
70   }
71
72   /**
73    * Returns the number of bytes available to be read, 0 if no known.
74    */

75   public long getLength()
76   {
77     return 0;
78   }
79
80   /**
81    * Converts to a string.
82    */

83   public String JavaDoc toString()
84   {
85     return "PopenInput[" + _process + "]";
86   }
87
88   public void close()
89   {
90     pclose();
91   }
92
93   public int pclose()
94   {
95     super.close();
96
97     try {
98       return _process.waitFor();
99     } catch (Exception JavaDoc e) {
100       return -1;
101     } finally {
102       _env.removeClose(this);
103     }
104   }
105 }
106
107
Popular Tags